Earth Sciences Commons^™

Shifting Rangeland Mineral Resource Limitations: Ecological Responses To Atmospheric Nitrogen Deposition, Heather L. Throop

IGC Proceedings (1977-2023)

No abstract provided.

How Do Grazing And Stochastic Rainfall Affect Vegetation? Insights From A Simulation Approach, S. Pütz, J. M. Paruelo, G. E. Weber, M. B. Bertiller, F. Jeltsch, T. Wiegand

IGC Proceedings (1977-2023)

No abstract provided.

The Results Of Analysis Of Allium Genus Of Mongolia, Batsukh Buyanchimeg

IGC Proceedings (1977-2023)

No abstract provided.

Investigation The Improvement Operations Affections On Ecological Indexes Of Rangeland Health In Rangelands Of Golestan Province, Iran, Zeid Ahmadi, Mehdi Abedi, Gholam Ali Heshmati

IGC Proceedings (1977-2023)

No abstract provided.

The Monitoring Of Ecological Effect Of Implement Of Sand Control Project In Sand Source Area Round Beijing And Tianjing, Jun Hong, Xujiang Yun, Jie Liu

IGC Proceedings (1977-2023)

No abstract provided.

Quantitative Analyses Of Cirques On The Faroe Islands: Evidence For Time Transgressive Glacier Occupation, Keyleigh N. Wallick, Sarah M. Principato

Student Publications

This study presents the first analysis of ice‐free cirques on the Faroe Islands using a Geographical Information System (GIS) and the Automated Cirque Metric Extraction (ACME) tool. The length, width, area, circularity, mean aspect, mean slope, and elevation range, minimum, and maximum were calculated using ACME. Cirque distance to coastline was measured using ArcGIS. A total of 116 cirques were identified. Mean cirque length is 950 m and mean cirque width is 890 m. Average cirque area is 0.8 km2 and mean elevation is 386 m a.s.l. The modal orientation of the aspect of cirques is north‐northeast, with a vector …

Changes Of Residue Function And Signaling Regrowth After Forage Cutting, Huimin Yang, Linag Zhao, Yuying Shen, Xiaoyan Zhang

IGC Proceedings (1977-2023)

No abstract provided.

Observation On The Pollen Morphology Of 5 Species Of Caragana Fabr. Plants In The Alashan Desert, Tao Wan, Ping Cai, Weidong Yi, Xiaoming Zhang, Chenbo Zhang

IGC Proceedings (1977-2023)

No abstract provided.

Rangeland Availability, Use Of The Flora And Land Ownership In El Toro Gorge (Rosario De Lerma Department, Salta Province, Argentina), Francisco Ramón Barbarón

IGC Proceedings (1977-2023)

No abstract provided.

Statement Of World Aquatic Scientific Societies On The Need To Take Urgent Action Against Human-Caused Climate Change, Based On Scientific Evidence [Dear Colleague Letter], Scott A. Bonar, Brian R. Murphy, Leanne H. Roulson, Jesse T. Trushenski, Douglas J. Austen, Michael Edward Douglas

United States Fish and Wildlife Service: Publications

Dear Colleague Letter from the American Fisheries Society to fellow scientific societies, July 25, 2020, about the urgent need for responsive collective action to mitigate impending radical climate change. Includes the Statement of World Aquatic Scientific Societies on the Need to Take Urgent Action Against Human-Caused Climate Change, Based on Scientific Evidence, emphasizing the importance of aquatic ecosystems. Includes extensive citations and notes.

"Water is the most important natural resource on Earth as it is vital for life. Aquatic ecosystems, freshwater or marine, provide multiple benefits to human society, such as provisioning of oxygen, food, drinking water, genetic resources; regulation …

Spatial‐Temporal Landscape Dynamics In The Hulunbeir Forest‐Steppe Ecotone, Licheng Liu, Shihai Lu

IGC Proceedings (1977-2023)

No abstract provided.

Compound System And Benefit Analysis About Legumes Forage Intercrop With Prickly Ash In Linxia, Yanqiong Zeng, Shiming Yang

IGC Proceedings (1977-2023)

No abstract provided.

Population Structure On Tubers Of Scirpus Planiculmisin Alkali‐Lake Habitat In The Songnen Plains Of China, Xun Tian, Yunfei Yang

IGC Proceedings (1977-2023)

No abstract provided.

Vegetation Succession Characters Of Desertification Grassland In Hulunbeier Steppe, Dongxia Liu

IGC Proceedings (1977-2023)

No abstract provided.

Study On Photoperiod Sensitivity And Hereditary Potentiality Maize Inbred Lines, Zhengmei Zhu, Feng Tang, Xiaoliang Lu

IGC Proceedings (1977-2023)

No abstract provided.

A Framework For Aquatic Invasive Species Surveillance Site Selection And Prioritization In The Us Waters Of The Laurentian Great Lakes, Andrew J. Tucker, W. Lindsay Chadderton, Gust Annis, Alisha D. Davidson, Joel Hoffman, Jon Bossenbroek, Stephen Hensler, Michael Hoff, Erika Jensen, Donna R. Kashian, Sarah Lesage, Timothy Strakosh

Environmental Science and Geology Faculty Research Publications

Risk-based prioritization for early detection monitoring is of utmost importance to prevent and mitigate invasive species impacts and is especially needed for large ecosystems where management resources are not sufficient to survey all locations susceptible to invasion. In this paper we describe a spatially-explicit and quantitative approach for identifying the highest risk sites for aquatic invasive species (AIS) introduction into the United States’ waters of the Laurentian Great Lakes, a vast inland sea with a surface area of 246,049 square km and a shoreline length of 16,431 km. We compiled data from geospatial metrics available across all of the US …

Geological Factors Impacted Cadmium Availability And Use As An Alternative Cofactor For Zinc In The Carbon Fixation Pathways Of Marine Diatoms, Naman Srivastava, Stephanie J. Spielman, Shaunna M. Morrison, Eli K. Moore

School of Earth & Environment Departmental Research

Transition metal cofactors are crucial for many biological processes. Despite being primarily considered to be toxic, the transition metal cadmium (Cd) was discovered to be a substitute for zinc (Zn) in photosynthetic carbon fixation pathways in marine diatoms. However, it is not known how conditions in the geosphere impacted Cd availability and its incorporation as an alternative metal cofactor for phytoplankton. We employed mineral chemistry network analysis to investigate which geochemical factors may have influenced the availability of Cd and Zn during the putative time period that alternative Cd-based pathway evolved. Our results show that Zn minerals are more chemically …

Microbial Diversity Drives Carbon Use Efficiency In A Model Soil, Luiz A. Domeignoz-Horta, Grace Pold, Xiao-Jun Allen Liu, Serita D. Frey, Jerry M. Melillo, Kristen M. Deangelis

Faculty Publications

Empirical evidence for the response of soil carbon cycling to the combined effects of warming, drought and diversity loss is scarce. Microbial carbon use efficiency (CUE) plays a central role in regulating the flow of carbon through soil, yet how biotic and abiotic factors interact to drive it remains unclear. Here, we combine distinct community inocula (a biotic factor) with different temperature and moisture conditions (abiotic factors) to manipulate microbial diversity and community structure within a model soil. While community composition and diversity are the strongest predictors of CUE, abiotic factors modulated the relationship between diversity and CUE, with CUE …

Preliminary Experiment On Photoregulation Of Turfgrass, Zhenping Zhu, Qinlu Lu, Xiao Liang

IGC Proceedings (1977-2023)

No abstract provided.

Stability Of Alpine Meadow Ecosystem On The Qinghai‐Tibetan Plateau, Huakun Zhou, Xinquan Zhao, Li Zhou, Wei Liu, Yingnian Li, Song Gu, Xinmin Zhou

IGC Proceedings (1977-2023)

No abstract provided.

Effect Of Nitrogen Application On Forage Yield In Alpine Rangeland, Q. P. Zhou, K. J. De, C. T. Xu, Y. J. Ji

IGC Proceedings (1977-2023)

No abstract provided.

Quantitative Classification Of Subalpine Grassland Under Degenerate Succession In Northwest Sichuan, Jiafu Zhou, Youmin Gan, Zhidan Li, Qin Wang, Ping Cheng

IGC Proceedings (1977-2023)

No abstract provided.

Testing The Correlation Of Trace Element Characteristics With The Petrology And Temperature Of Eruption Of Mid-Miocene Rhyolites In Eastern Oregon, Brianna Christine Young

Dissertations and Theses

The Lake Owyhee Volcanic Field (LOVF) in eastern Oregon experienced several major eruptive events during the mid-Miocene (16.8 to 15.5 Ma), resulting in the emplacement of 3,900 km³ of rhyolitic lava flows and ash-flow tuffs. Eighteen samples from eleven different silicic centers in the LOVF were selected for this study. While all samples of this study are classified as rhyolite, their compositions vary greatly in terms of trace and major elements. Using trace elements, these rhyolite samples are classified as "A-type", described as resulting from "hot and dry" magmas and associated with hot-spot activity, or as "I-type" or "calc-alkaline", …

Influence Of Stress On Physiological‐Biochemical Characteristics Of Three Atriplex L. Plants, Dandan Zhou, Shengrong Hu, Yong Gao

IGC Proceedings (1977-2023)

No abstract provided.

Technique Of Plant Regeneration From Immature Inflorescence Of Pennisetum Purpureum In Vitro, Xiaoxian Zhong, Jianming She, Hongru Gu, Jianli Zhang

IGC Proceedings (1977-2023)

No abstract provided.

Comparison On Water‐Stress Tolerance Of Three Alfalfa Varieties, Jinmei Zhao, He Zhou, Qizhong Sun

IGC Proceedings (1977-2023)

No abstract provided.

Grassland Resource In Hebei Province Of China, Hailiang Yu, Minyun Xu, Lianshu Li, Yunqi Li, Jiaxiang Li, Jinshan Gen, Haiyan Yang

IGC Proceedings (1977-2023)

No abstract provided.

Fire Suppression Impacts On Fuels And Fire Intensity In The Western U.S.: Insights From Archaeological Luminescence Dating In Northern New Mexico, Christopher I. Roos, Tammy M. Rittenour, Thomas W. Swetnam, Rachel A. Loehman, Kacy L. Hollenback, Matthew J. Liebmann, Dana Drake Rosenstein

Geosciences Faculty Publications

Here, we show that the last century of fire suppression in the western U.S. has resulted in fire intensities that are unique over more than 900 years of record in ponderosa pine forests (Pinus ponderosa). Specifically, we use the heat-sensitive luminescence signal of archaeological ceramics and tree-ring fire histories to show that a recent fire during mild weather conditions was more intense than anything experienced in centuries of frequent wildfires. We support this with a particularly robust set of optically stimulated luminescence measurements on pottery from an archaeological site in northern New Mexico. The heating effects of an October 2012 …

The Rocky Ledge Fault, Shasta County, Ne California: Development And Morphology Of A Quaternary Oblique Normal Fault In Basalt, Gregory David Linscott Martin

Dissertations and Theses

Distinct morphology, variable vertical separation, and unique structural geometries are observed along the Rocky Ledge fault (RLF), an east-dipping, oblique normal fault in the tectonically complex Hat Creek Graben, Shasta County, NE California. Situated in the southern Cascade arc, the RLF is located at the boundary of the Klamath Mountains, Basin and Range, and Walker Lane Seismic Belt. The primary goal of this project is to better understand Quaternary deformation along the RLF. I developed detailed maps of geologic units and structures along the ~15 km length of the RLF. Map data informs assessment of fault geometry, scarp morphology, and …

The Study On The Inflorescence Differentiation Of Bromus Ciliatus L. Cv. Xilinguole, G. You, F. Shi, L. Wang

IGC Proceedings (1977-2023)

No abstract provided.